<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>display</title>
    <script type="text/javascript">
        function hidetext()
        {
            var mychar = document.getElementById("con");
            mychar.style.display="none";
        }
        function showtext()
        {
            var mychar = document.getElementById("con");
            mychar.style.color="red";

            mychar.style.display="block";
        }
    </script>
</head>
<body>
<h1>JavaScript</h1>
<p id="con">做为一个Web开发师来说，如果你想提供漂亮的网页、令用户满意的上网体验，JavaScript是必不可少的工具。</p>
<form>
    <input type="button" onclick="hidetext()" value="隐藏内容" />
    <input type="button" onclick="showtext()" value="显示内容" />
</form>
</body>
</html>